1611225907 has 2 divisors, whose sum is σ = 1611225908. Its totient is φ = 1611225906.

The previous prime is 1611225883. The next prime is 1611225929. The reversal of 1611225907 is 7095221161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611225907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1611225607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805612953 + 805612954.

It is an arithmetic number, because the mean of its divisors is an integer number (805612954).

Almost surely, 2^1611225907 is an apocalyptic number.

1611225907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611225907 is an equidigital number, since it uses as much as digits as its factorization.

1611225907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 1611225907 is about 40140.0785624543. The cubic root of 1611225907 is about 1172.3361186840.

The spelling of 1611225907 in words is "one billion, six hundred eleven million, two hundred twenty-five thousand, nine hundred seven".